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Post by abacus9900 on Apr 4, 2011 19:09:27 GMT 1
Some objects in the Universe have been found to be older than Universe itself, based on the BB model.
Stars found in globular star clusters near the Milky Way are estimated to be about 10 to 20 billion years old, predating the the age of the BB event itself.
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Post by speakertoanimals on Apr 4, 2011 19:20:28 GMT 1
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Post by skeptic on Dec 31, 2011 15:49:45 GMT 1
One problem was that it took us some time to work out what we believe is the age of the universe, so there were things older than the lower estimates.
Another problem was people unknowingly reading gravitational redshifts from black holes and adding them to recessional redshift so giving an unnaturally far distance.
One of the oldest things in the universe is HE 1523-0901, a star which is 13.2 billion years old and is a mere 7,500 light years from us in our own galaxy.
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Post by principled on Dec 31, 2011 19:30:51 GMT 1
Skeptic:
For those of us who aren't cosmologists, could you give some info on the evidence that led to this age estimation?
P
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Post by striker16 on Dec 31, 2011 21:53:51 GMT 1
Skeptic: For those of us who aren't cosmologists, could you give some info on the evidence that led to this age estimation? P Apparently, principled, the European Southern Observatory's Very Large Telescope was able to measure the decay of the elements uranium and thorium together with some other elements to determine the star's age. Don't ask me how.  It's the oldest object yet discovered in our galaxy. en.wikipedia.org/wiki/HE_1523-0901 |
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Post by skeptic on Jan 1, 2012 11:40:16 GMT 1
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It's the oldest object yet discovered in our galaxy.